Many people have heard of such a useful coating as polarizing film. However, not everyone knows about its properties and scope. Today, thanks to the ability to make purchases through online services, it is not difficult to purchase a polarizing film in Moscow, as well as in Novosibirsk, Krasnoyarsk and other cities of Russia. The main thing is to find out all its properties before buying in order to be able to use it correctly for a variety of purposes.
Film properties
The concept of polarization implies the restriction of light waves by passing them through a special lattice. The distance between the filaments of such a lattice is equal to the length of the light rays. This allows you to pass one wave in a certain plane.
A polarizing film transmits only that part of the light flux that is parallel to its axis. Such a coating is created in two ways. The first involves spraying metal strips onto the polymer base. The second method uses the technology of iodine-polyvinyl films. Both methods are widely used for a variety of purposes.
Using the presented product, you can limit the luminous flux, lower the brightness, scatter rays, darken the mirror and screen surfaces, and also protect yourself from direct sunlight.
Application
Many areas have the use of such a coating as a polarizing film. Novosibirsk, Ufa, Yekaterinburg and other cities of Russia use it for the same purposes.
Many drivers choose sunglasses whose lenses are coated with a polarizing film. Yes, and ordinary consumers liked such inventions because of the comfort of viewing in sunny weather.
In the automotive field, polarizing films are used for tinting windows, rear-view mirrors, and windshields. This helps protect against glare from oncoming traffic or the bright sun.
Polarizing film for the monitor and other LCD displays has long been loved by users. This allows you to increase the contrast of the image. For screens and monitors, a polarizing film in combination with special stereo glasses will create a three-dimensional picture effect.
For lens filters also apply the technique presented. Even the windows of the houses are protected by a polarizing film in order to avoid blinding light in the room from the outside.
How to create a film
The presented product is made from polyvinylylene. For this, polyvinyl alcohol (PVA) is used.
Phosphoric tungsten acid may also be added to the product.
In the manufacturing process, the initial billet is stretched 5-7 times. Then the product is fired at a temperature of about 140 degrees.
This technology gives the required qualities to such a coating as a polarizing film. Why do you need stretching? This allows you to build the molecular orientation of the components.
Heat treatment extends the durability of the product, making it resistant to heat and moisture. Equipment can have a variety of indicators, for which a polarizing film is processed by the presented method.
Types of films
Depending on the components used to produce the PVA film, there are 3 varieties of it. This can be a product containing dichroic rulers, polyvinylethylene links or polyiodine complexes.
The polarization method distinguishes between mechanical and electrical gratings.
To increase or decrease the polarization mechanically, the filaments of the lattice are displaced relative to each other. The elements move mechanically, and the polarizing film moves. How to tint glass, manufacturers calculate by applying the correct angle of displacement of the surfaces.
Electric polarization is considered a more promising method, since it does not require mechanical components. Light in such an article passes through a polarizer and liquid crystals. When the current is connected, they rotate in the direction of its flow. Thus, filaments of a lattice transmitting light flux are formed.
Polarization for car
Applying a polarizing film for a car, you should responsibly approach this issue. Improper polarization can cause accidents due to insufficient visibility for the driver.
A polarizing film is applied to the windshield to eliminate glare from oncoming vehicles in the driver’s eyes.
The technology presented is very useful for polarizing salon mirrors. It happens that the headlights of a car riding behind a bright flash illuminate them. If the driver at this moment looks in the mirror, he may be blinded. It will take time until the car owner can again see perfectly. And these few seconds he will have to drive almost blindly. The film will help limit the flow of glare from the headlights and preserve the ability of the driver to see the road clearly.
Polarizing film for cars is also used for tinting windows on the doors and rear.
Film for screens of electronic devices
In order to maximize the productivity of a person working on a computer, the comfort of his work should be ensured.
It is convenient to work on any equipment with a display when only the user sees data on its screen. It is very unpleasant when others are curiously looking into the device’s interface.
To protect information, a polarizing film is used. It is attached to the screen with an adhesive base. If desired, it can be removed or worn on the screen of a tablet or smartphone, only while traveling.
A polarizing film for the monitor limits the passage of light rays that pass at an angle of more than 60 degrees.
The presented products are moisture resistant and withstand temperature extremes. The film itself is able to protect the screen from mechanical damage and scratches, since polycarbonate is a fairly durable material.
For each device, films of a certain format are produced.
Polarized glasses
Polarizing film for glasses helps protect your eyes from the blinding light emitted by machinery and equipment. Glare coming from various surfaces can not only impair the visibility of parts, but also blind, impair eye health.
Therefore, in the most diverse fields of activity, vision is protected by glasses with a polarizing film. It is inside the lens.
Ordinary sunglasses do not remove glare from the surface of water, snow, mirrors. To do this, they are combined with a coating such as a polarizing film. In Krasnoyarsk, Sochi, Moscow and other cities of our country, many drivers, workers of various professions and ordinary citizens use such glasses to maintain eye health.
Polarized glasses reduce eye strain. Eyes get tired less. Contrast and sharpness of the image increase. And also such a product increases the safety of workers in certain professions. Particularly liked the polarization glasses for drivers.
Making polarizing lenses
Among the existing technologies for manufacturing polarization lenses, the oldest is the use of mineral glass.
Today this method is used extremely rarely. The most commonly used technology is lamination with organic substances (CR-39). A polarizing film is inserted between two lens webs. This helps to avoid delamination.
However, the newest and most promising technique is to place the film on the front glass. The polarizer is processed to improve its resistance to damage, abrasion. This allows the product to fulfill its polarization properties as efficiently as possible. The protective coating of the film increases its resistance to shock.
Window film
For a person’s well-being in a room, the level of illumination, its intensity and naturalness are important. Comfortable light is good for eye health and even the state of the nervous system.
The bright sun bursting into the room wakes up in the early morning, and during the day it becomes unbearably hot in such a room. In order not to hang windows with curtains or blinds, there is a special way. Glass tinting solves the problem of very bright natural lighting.
A polarizing film for windows reduces solar energy by 65% without compromising light transmission. Such a coating creates a certain protection against the thermal conductivity of the glasses, which helps to maintain a comfortable microclimate in the room.
The polarizer enhances the resistance of glass to mechanical damage, scratches.
How to make a film for the monitor
Typically, the manufacturer supplies LCD monitors with polarizing film. It can be glued to the monitor or simply pressed tightly with trims.
If it is necessary to replace this product, it is necessary to pay attention to the technology of such a process.
You need to purchase a film according to the size of the previous option. The old film is dismantled. If necessary, glue is removed with a solvent. Changing the polarization film with your own hands, you need to make sure that the solvent does not get on the plastic elements of the monitor.
Having completely cleaned the base, a new coating should be installed.
Do-it-yourself polarization film must be correctly positioned. It matters where the front and back are. It is also important to maintain the correct position of the parties. Next, the parts of the monitor are assembled together.
Polarization check
There are several ways to verify the correct operation of the polarizer.
You should take two films (or lenses of glasses) and direct them against each other. Visibility through two layers should be perfect. Then on the first lens you need to mentally draw a perpendicular axis. The second film (lens) should be rotated around an imaginary axis. When the rotation angle reaches 90 degrees, visibility should be zero. If, after these actions, the visibility remains the same, the product does not have the polarizing properties.
Instead of a second film, you can use the screen of a monitor, phone or tablet. When you rotate the film 90 degrees, the image should become much darker.
Having examined the whole range of products in which polarizing film is used, one can realize the importance of this product for human health, as well as its safety. Understanding the principle of its structure and quality criteria, it will be easy to distinguish a polarizer from ordinary material.